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Watch more How to Pull Pranks videos: http://www.howcast.com/videos/308390-How-to-Flip-a-Computer-Screen

If your work is boring you to tears, have a little fun with your neighbor’s computer and turn those tears of boredom into tears of laughter.

Step 1: Sneak to the computer
Sneak over to your victim's computer while they are away from their desk.

Step 2: Press Control, Alt, F1
On a PC, enable the rotation by pressing the Control, Alt, and F1 keys at the same time to activate the image rotation.

Tip
Some users may have set their own key combination for the rotation activation. If Control, Alt, F1 does not work, you will need to find someone else to trick.

Step 3: Hold Control and Alt and press down arrow
Hold down the Control and Alt keys and press the down arrow key to flip the screen.

Step 4: Flip the screen on a Mac
Flip a Mac's screen by entering the System Preferences menu and clicking on the Displays tab. 

Step 5: Choose the rotation degree
Choose the degree of rotation on the rotation menu.

Tip
This will only work on Mac computers with an external display monitor. 

Step 6: Slink back to your desk
Slink back to your desk and wait for your co-worker to return.

Did You Know?
In 2007, Eric Kloeker broke his own world record by juggling upside down for five minutes straight.